Extensible bracket.



O. H. PIEPBR. EXTENSIBLE BRACKET. APPLIGATIOH FILED 111111: 19. 1807.

m m m Um w m u r mm W a 0. H. PIEPER. EXTENSIBLE BRAUKET. APPLICATION FILED mm: 19,1907.

@Wituma OSCAR H. PIEPER, OF ROCHESTER, NEW YORK.

ExTENsmLE naaoni'r.

Specification)! Letters Patent. Application filed June 19, 1907. Serial 1%. 879,691.

ratentelireu. 29, icon.

To all whom it may. concern:

Be it known that I, OSCAR H. PIEPER, of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Extensible Brackets; and I do hereby declare the folof parallel links are connected so as to permit a supported elementto be moved to and from a supplorting element and, without the use of weig ts or springs, to be maintained in any posltion to which it may be adjusted; one object of the inventidn being to provide a bracket in which the links are so connected to the supporting and the supported members that a stron er bracket is secured; and a further object eing to prevent the supported element being accidentally moved with too great a force against the supporting element.

A To these and other ends the invention consists in certain improvements and combinations of parts all as will be hereinafter more fully described, the "novel features being pointed out in the claims at the end of the specification.

In the drawin s: Figure 1 is a side view of a bracket embodying my invention, arranged in extended position. Fig. 2 is a like view showing it collapsed and enlarged. Fig. 3 is a section on line aa, of Fig. 2, through the sup orted member. Fig. 4 is a section on line b of Fig. 1, through the ivotal connection. Fig. 5 is asection on ine cc of Fig. 1. Fig. 6 is a section on line d-d of Fig. 2 of the guide member of the sup orting element detached from the attac 'ng member. Fig. 7 is a side view of the supporting member of another bracket embodyin my invention, and Fig. 8 is a section on no ee of Fig. 7.

The bracket herein shown comprises a supporting member and a supported member connected by a link system.

In the embodiment shown in Figs. 1 to 6 the supporting element comprises an attachinlg member 1 and a guide member pivotal y connected to the former, as by per forated ears 3 and 4 through which ass the pivot rod 5. The uide member as two vertical guides whie are alined with each other and are preferably formed by two parallel strips or platQs 6, each having two vertical gui as or slots 7 and 8, the walls of the upper slots forming one guide and the walls of the lower ones forming the other. This link system Ifiirseferably comprises two pairs of parallel li 'pivotally connected at 10*, 10", 10 and 10 in such a manner that the members forming each pair move in arallel lines the pivots 10 and 10 being coated an equaLdlstance from the pivots 10 and 10. Each link of the inner pair has its free and arranged to turn on one of the pivot pins 11 which in this instance are in the form r of bolts, each carrying a pair of guide blocks 12 arranged to slide 1n t e opposite slots of one of the uides 7 or 8. A suitable means is provided or causing the members of the inner pair to move in opposite directions to and from the center of the guide member and this means preferably comprises a short link 13 connecting the members, preferably by turning at one end on the slidable bolt 11 of the lower link and at its other end secured to the up or link a distance from the pivot 10" thereo equal to the distance of the bolt 11 from the pivot 10. The short link 13 is connected with the supporting member between the links by a short link 14, which for this pur ose is pivoted at one end to link 13 interme iate of the ends of the latter and at the other end on bolt 15 connecting the flan es 6 at a point between the guides 7 and 8. The other end of the link system has secured thereto the supported member which preferably comprises an attaching member 17 and a guide member 18 consisting of two strips or p ates 19 and 20 arranged in spaced relation and each provided with two vertical slots or guides 7 and 8 as on the supporting member, the links 9' being in this instance connected thereto in the same manner as the links 9 connected to the supporting member, except that the bolt 15. is longer and passes through two ears 21 on the attaching member 17 to secure together the two parts of the supported member, the strips c the guides of the sup engaging the front wall of the attaching plate in such a manner as to prevent their movement on the plate.

As the bracket'is at times collapsed with a eat deal of force, it is desirable to prevent ar'both of the bracket and of the element supported thereby, and for this reason I emplo one or more, preferably two, yielding u era, for engaging the links of the system and retarding their movement. In-the present embodiment the buffers are movable on rting member and are preferably connect by a coil spring 22 which tends to move them toward each other but whose action is limited by stops 23 ard in the path of the bufi'ers. Each b er in the present instance comprises a series of washers 24 or other spacing devices arranged between two ide blocks 25 and 26 and connected therewith by a bolt 27. The guide blocks 25 and26 move in the slots 7 and 8 and one of them at its outer end is provided with a laterall and rearwardly exten arm 28 to w 'ch the spring 22 is secur In 7 and 8 I have illustrated another embodiment of the invention, the supported member which is constructed in the same manner as the supporting member not being shown. The supporting member in this embodiment'cornprises' an attaching member 29 and a guide member 30. The attaching member is formed to permit the guide mem her to move horizontal] thereon and for this purpose is provided wit a pair of horizontal arms 31 and 32, the lower one 32 being biiurcated to permit the link system to partake of its movements; while the guide member comprises two strips connected at their upper ends by a cross iece 33 slidable in the upper arm 31 and eac having a'vertical slot 34 to form the guide for the link system, and a cross piece 35 at its lower end to move in a longitudinal groove in one of the members of the lower arm 32, the rear ends of the cross pieces being connectedby a block 36 to tie the lower ends Q1 the strips to ether. The link system as inthe otherembo iment, comprises four links'9 and 9" arranged in pairs, pivotally connected together, and each carl'yilfisll sliding pivot pin 37 having guide blo 38 working in the slot 34. The members of each air are connected by a short link 13 'whic is pivoted to rigid arm 39 extending horizontally from the attaching plate 29 at a point between the two sliding connections.

It will be noted that in both embodiments, the link system is pivotallyconnected to the supporting and the supported member, and has a sliding connection with the said members on opposite sides of its pivotal connection. This construction permits the use of a l' hter supporting and supported member as file strain on said members is distributed on opposite sides of the pivotal connections and not at one end of the members.

I claim as my invention:

1. In an extension bracket, a su porting and a supported member, and a hull system pivotally connected to each of said members and having sliding connection with each upon opposite sides of each pivotal connection.

2. In an extensible bracket, a supporting and a supported member, a link system connecting said members andlembodying two links each be sliding connection with one of said mem ers, and a link pivotally connected to said two links andconnected with the said member at a point between the two links.

3. The combination with two pairs of parallel links, each pair being pivoted to the other so that its members move in arallel lines, of a supporting and a supporte member each be guides thereon, in which the free ends 0 a pair of links move, and short links each connecting the members of a pair of parallel links and connected to the supporting or supported member between the parallel links.

4. The combination with two pairs of parallel links, each pair being pivoted to the other so that its members move in arallel lines,-of a supportin and a supports member each having ui es thereon in which the free ends of a pair of links move, short links each connecting the members of a pair, and lipks each connecting a short linkand the s pporting or the su ported member between the parallel linl s.

5. In an extensible bracket, a supporting and a sup orted member, one of which has a guide, a ink system connecting said members and having a link movable on the guide, andda yielding bufl'er also movable on the gul e.

6. In an extensible bracket, a supporting and a supported member, a link system connecting said members and embodying a link guided on one of said members, and a yieldmg bufier engaged by the link.

7. In an extensible bracket, a supporting and a supported member, a link system connecting said members and embodyin a pair of links guidedon one of said mem ers, a pair of buffers engaged by the air of links and a single spring acting on both buffers and permitting them to yield. 8. In an extensible bracket, a supporting and a supported member, one of which has two guide ways thereon, and a link system embodying a pair of links movable on the guide ways, a pair of buffers also movable on the ides and adapted to be engaged by the pair of links, a single s ring acting on both bufiers and a stop fgr limiting the movement of the bufi'ers on the guides.

9. In an extensible bracket, a supporting and a supported member, one of which comand having arms extending therefrom, and a prisfias ltwo spalcecll parallel strips provided spring connecting the arms. wit s ots, a. in s *stem connecting t 1e members and embodg ing a pair of links ar- OSCAR PIEPER' ranged between the stn s and working in Witnesses: the slots a air of buflgrs adapted to be H. H. Sums, engaged lay t e levers, working 1n the slots RUSSELL B. GRIFFITH. 

